No luck on our Emu eggs

Today is day 56 for emu eggs and no luck. One of them I was a little concerned about from the first because when you turned it you could feel somthing move inside and figured the yolk was loose. The other was tapping at me when I whistled at it from day 35 through 45. Since they are supposed to hatch in 46 to 55 days I figured we'd have a baby on the 46th day or soon thereafter, but the tapping stopped and no movement was seen afterwards. We go back to school on Monday after 3 weeks off,, I hate to tell the kids but they knew it could happen. Kristina thanks for all the help, advice, and support!
Kate